資源描述:
《基于無線傳感器網(wǎng)絡(luò)光強環(huán)境監(jiān)測系統(tǒng)設(shè)計》由會員上傳分享,免費在線閱讀,更多相關(guān)內(nèi)容在學術(shù)論文-天天文庫。
1、華中科技大學碩士學位論文摘要無線傳感器網(wǎng)絡(luò)因其在軍事領(lǐng)域、環(huán)境監(jiān)測領(lǐng)域等的巨大的應(yīng)用價值而得到了國內(nèi)外研究者的廣泛關(guān)注。其大規(guī)模性、自組織性、動態(tài)性及可靠性等特點又充分體現(xiàn)出了其應(yīng)用于獲取大面積環(huán)境、大量隨機研究數(shù)據(jù)和人類難以到達的長期監(jiān)控區(qū)域的優(yōu)勢。系統(tǒng)設(shè)計時選擇了環(huán)境數(shù)據(jù)中較常見的可見光光強作為本設(shè)計的檢測對象,著重介紹了無線傳感器網(wǎng)絡(luò)的搭建和實現(xiàn)。實現(xiàn)了一種基于無線傳感器網(wǎng)絡(luò)的環(huán)境監(jiān)測系統(tǒng),提出了由傳感器節(jié)點、匯聚節(jié)點、服務(wù)器和用戶構(gòu)成的四層系統(tǒng)結(jié)構(gòu)。該系統(tǒng)可通過將傳感器節(jié)點部署在所要監(jiān)測的區(qū)域范圍內(nèi),依靠傳感器節(jié)點獨具的自組織的特性自動的組建成傳感器網(wǎng)絡(luò);每一個節(jié)點都將自己采集的環(huán)境監(jiān)
2、測數(shù)據(jù)發(fā)送到匯聚節(jié)點;匯聚節(jié)點再將收集到的傳感器節(jié)點數(shù)據(jù)進行集中匯集后再經(jīng)由網(wǎng)關(guān)發(fā)送到與Internet直接相連的基站電腦上;基站電腦再將匯聚節(jié)點發(fā)送過來的數(shù)據(jù)通過Internet發(fā)往數(shù)據(jù)庫服務(wù)器;此時,遠程用戶就可以通過網(wǎng)絡(luò)來訪問數(shù)據(jù)中心的數(shù)據(jù),達到監(jiān)測環(huán)境的目的。這種實現(xiàn)方式使得節(jié)點的部署非常容易,開發(fā)系統(tǒng)和維護系統(tǒng)的成本又非常的低,系統(tǒng)的開發(fā)效率高。在設(shè)計系統(tǒng)的過程中,選用Atmel公司出品的ATmega128L單片機和CC2420等芯片搭建起了硬件平臺,以嵌入式操作系統(tǒng)——TinyOS為軟件平臺,以面向結(jié)構(gòu)化組件應(yīng)用的NesC語言為編程語言,并利用TinyOS的仿真器——TOSSIM來
3、進行系統(tǒng)調(diào)試、模擬節(jié)點的燈光閃爍、數(shù)據(jù)傳遞、數(shù)據(jù)采集等情況,并得到所采集光強數(shù)據(jù)的測量曲線,為實際研究提供了極大的便利。關(guān)鍵詞:無線傳感器網(wǎng)絡(luò)光強測量微操作系統(tǒng)仿真I華中科技大學碩士學位論文AbstractWirelessSensorNetworks(WSN)hasreceivedwidelyattentionbothathomeandabroadbecauseofitsgreatapplicationvalue.WSNislarge-scale,self-organizing,dynamicandreliability,whichmeansithasadvantageinapplicatio
4、nofaccessingextensiveenvironmentalmonitoringdataandalargenumberofrandomizedresearchoneandlong-termcontinuousmonitoringofhard-to-reachregion.ThispaperemphasizesonhowtosetupandimplementWSN,whichtakesluminousintensitymeasurementofthemappedregionforexample,implementsanEnvironmentalMonitoringSystemwhichi
5、sbasedonWSN,putsforwardafour-layerstructureof“sensornode-sinknode-server-user”.Thesystemallowssensornodesarbitrarilytobedeployedinthemonitoredregionandconstituteasensornetworkbyself-organizing.Everysinglesensornodecollectsdata,whichissenttothesinknode,andthenthesinknodesendsthegathereddatatothePCinb
6、asestation,whichdirectlyconnectswiththeInternetviagatewayandsendsthedatatothedatabaseserver.Remoteusershaveaccesstothosedataindatacenterinordertoachievetheirgoalsofmonitoringenvironment.ThesystemusesATmega128L,whichismadeinAtmelCompany,assinglechipandCC2420asradiofrequencychiptoworkasitshardwareplat
7、form,whileusesTinyOSforitsoperationsystemandchoosesacomponent-orientedlanguageNesCforprogramminglanguage.Imitatingthenodesblink,datacollectionandtransmissionanddrawingmeasurementcurveofthegathereddata